God Has Made Full Provision For Us To Life A Godly Life (2 Peter 1:3-4).
Having greeted the recipients, and having reminded them that they had a like precious faith with all God's people, Peter now reminds them of the huge benefits that that faith has brought them. They should recognise that the divine power of their Lord and Saviour Jesus Christ has granted to them all that is necessary for life and godliness through their knowledge of Him, as the One Who has called them by His own glory and excellence.
In other words, says Peter, the spiritual knowledge of our Lord, Jesus Christ, provided to us by His divine power, is our all sufficiency in all things. In knowing Him we have all that we can possibly need in order to live out our lives in accordance with His good pleasure (Philippians 2:13). For through Him God has ‘shined in our hearts giving us the light of the knowledge of the glory of God in the face of Jesus Christ' (2 Corinthians 4:6; compare 1 Peter 2:9).
Thus in Paul's words our desire must be, that more and more ‘we might know Him, and the power of His resurrection, and the fellowship of His sufferings, being made conformable to His death, if by any means we might attain to the resurrection from among the dead' (Philippians 3:10-11). And the result will be that we will be ‘strengthened with power through His Spirit in the inner man', with Christ dwelling in our hearts by faith (Ephesians 3:16-17), so that being rooted and grounded in His love which passes all knowledge, we will be filled with all the fullness of God (Ephesians 3:17-19).
The comprehension of these glorious truths is important for what follows. For it is this very knowledge that they have of their Lord, Jesus Christ, in all His glory, that will reveal the folly of the experiences being offered by the false prophets in chapter 2. Indeed it is that knowledge from which they have turned away (2 Peter 2:20-22).